Roger Mills (aka Set Square) wrote:
In an earlier contribution to this discussion,
wrote:


One other factor that you may wish to consider is that there is a
30m^2 floor area limit for construction of a detached garage, below
which Building Regulations do not apply.

So long as it's also at least one metre from the property boundary.

OR constructed mainly of fireproof material (according to the article which
Andy cited - in which case the one metre rule doesn'y apply).

OK. The link I found said AND but OR seems to be in the majority. I
suggest checking the source building regs documents.

MBQ